India is accelerating investments in metro, RRTS, and suburban rail networks, aiming to become the world’s second-largest metro system while promoting sustainable urban mobility and Transit-Oriented Development. Meanwhile, China plans to expand rail tourism with over 160 tourist trains by 2030, and Siemens Mobility is advancing hydrogen and hybrid rail solutions in Europe. New railway projects are also set to improve connectivity in Chhattisgarh and strengthen trade links between Türkiye, Saudi Arabia, and Europe.

Some of history’s most powerful cities—including Rome, Babylon, Constantinople, Tenochtitlan, and Machu Picchu—rose to become centers of wealth, culture, and political power before eventually declining. Their falls were driven by factors such as invasions, political instability, economic decline, disease outbreaks, shifting trade routes, and foreign conquest, leaving behind enduring legacies that continue to shape world history and tourism today.